Ice water diver Rhian Waller is a national geographic explorer. She teaches at the Darling Marine center in the United States. She studies animals that live in extreme places. She is very interested in corals and often has to dive in cold water to study them. Listen again. Complete the sentences. Use the correct form of the words in the box ( Nghe lại lần nữa. Hoàn thànhcâu. Sử dụng dạng đúng của từ trong bảng)